Predictions of pulsed field gradient NMR echo-decays for molecules diffusing in various restrictive geometries. Simulations of diffusion propagators based on a finite element method
(2003) In Journal of Magnetic Resonance 161(2). p.138-147- Abstract
- Pulsed field gradient NMR diffusometry is a promising tool for investigating structures of porous material through determinations of dynamic displacements of molecules in porous systems. A problem with this approach is the lack of closed analytical expressions for echo-decays in anything but idealized pore geometries. We present here an approach based on calculating the appropriate diffusion propagator by means of finite element calculations. The suggested method is quite general, and can be applied to arbitrary porous systems. The protocol for the calculations is outlined and we show results from some different cases: diffusion in confined geometries and in systems that are spatially inhomogeneous with respect to concentration.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/122007
- author
- Hagslätt, H ; Jönsson, Bengt LU ; Nyden, M and Söderman, Olle LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Simulation, Finite element method, Propagator, Diffusion, Pulsed field gradient NMR
- in
- Journal of Magnetic Resonance
- volume
- 161
- issue
- 2
- pages
- 138 - 147
- publisher
- Academic Press
- external identifiers
-
- wos:000184409600003
- scopus:0038150147
- ISSN
- 1096-0856
- DOI
- 10.1016/S1090-7807(02)00039-3
- language
- English
- LU publication?
- yes
- id
- 512f2ade-16f8-4783-858e-2b337bded3e4 (old id 122007)
- date added to LUP
- 2016-04-01 16:14:14
- date last changed
- 2022-01-28 18:17:38
@article{512f2ade-16f8-4783-858e-2b337bded3e4, abstract = {{Pulsed field gradient NMR diffusometry is a promising tool for investigating structures of porous material through determinations of dynamic displacements of molecules in porous systems. A problem with this approach is the lack of closed analytical expressions for echo-decays in anything but idealized pore geometries. We present here an approach based on calculating the appropriate diffusion propagator by means of finite element calculations. The suggested method is quite general, and can be applied to arbitrary porous systems. The protocol for the calculations is outlined and we show results from some different cases: diffusion in confined geometries and in systems that are spatially inhomogeneous with respect to concentration.}}, author = {{Hagslätt, H and Jönsson, Bengt and Nyden, M and Söderman, Olle}}, issn = {{1096-0856}}, keywords = {{Simulation; Finite element method; Propagator; Diffusion; Pulsed field gradient NMR}}, language = {{eng}}, number = {{2}}, pages = {{138--147}}, publisher = {{Academic Press}}, series = {{Journal of Magnetic Resonance}}, title = {{Predictions of pulsed field gradient NMR echo-decays for molecules diffusing in various restrictive geometries. Simulations of diffusion propagators based on a finite element method}}, url = {{http://dx.doi.org/10.1016/S1090-7807(02)00039-3}}, doi = {{10.1016/S1090-7807(02)00039-3}}, volume = {{161}}, year = {{2003}}, }